Untitled Flashcards Set
Score for this quiz: 15 out of 18
Submitted Oct 5 at 1:23pm
This attempt took 19 minutes.
Question 1
0 / 1 pts
A group of students were surveyed regarding their opinion of which fruit is nicest. In the resulting bar chart below, what is the visual cue for the nominal, categorical variable representing the type of fruit?
Correct Answer
Position and Color
You Answered
Color
Position
Height
Question 2
1 / 1 pts
The scatter plot below attempts to correlate the wealth (GDP) of a nation and its carbon (CO2) emissions. What scale does the graphic use for the continuous, numerical variable representing carbon emissions?
Geographic
Ordinal
Correct!
Logarithmic
Linear
Question 3
1 / 1 pts
When constructing a bar chart of counts for a categorical variable, the axis representing the count variable should always start at _______.
the minimum count value
Correct!
zero
one
the maximum count value
Question 4
1 / 1 pts
When conducting text mining, the unit of observation (e.g., word, sentence, or paragraph) for the data is known as the _________.
Correct!
token
lexicon
expression
gem
Question 5
1 / 1 pts
When conducting word frequency analysis, articles, prepositions, and conjunctions are referred to as _________.
sentiments
regular expressions
tokens
Correct!
stop words
Question 6
0 / 1 pts
Referring to the word cloud below, which of the following interpretations of word frequency is FALSE?
The word "knowledge" appears more than twice as much as "education"
You Answered
The word "teacher" appears less than half as much as "student"
Correct Answer
The word "comprehension" appears more than the word "students"
The word "education" appears more than the word "wisdom"
Question 7
1 / 1 pts
A ________ depicts the frequency of values for a categorical variable, while a ___________ depicts the frequency of values for a numerical variable.
histogram, bar chart
Correct!
bar chart, histogram
scatter plot, box plot
box plot, scatter plot
Question 8
1 / 1 pts
The histogram below depicts the relative frequency of lengths (inches) for parts randomly selected from an assembly line. How would you describe the shape of this distribution?
Left Skewed
Right Skewed
Correct!
Bimodal
Unimodal
Question 9
1 / 1 pts
Which of the following statistics is NOT a measure of centrality for numerical variables?
Correct!
Maximum
Median
Mean
Mode
Question 10
1 / 1 pts
The median is a measure of centrality for numerical variables. Which of the following statistics is NOT equivalent to the median?
0.50 quantile
50th percentile
Correct!
50th quartile
Middle value
Question 11
1 / 1 pts
Which of the following statistics is NOT a measure of spread for numerical variables?
Range
Variance
Correct!
Modality
Standard Deviation
Question 12
1 / 1 pts
What is the interquartile range (IQR) for the vector of variable values below?
values=(0,2,2,8,8,11,13,18,26,26,27,30,30,34,37,40)
Correct!
22
40
18
34
Question 13
1 / 1 pts
The box plot below depicts the air quality (ozone in parts per billion) in New York City during certain months of the year. Based on this plot, which of the following statements is FALSE?
The 0.50 quantile of ozone in May is less than 25 ppb.
The 25th percentile of ozone in August is greater than 25 ppb.
The 3rd quartile of ozone in July is greater than 75 ppb.
Correct!
The interquartile range of ozone in August is less than 25 ppb.
Question 14
1 / 1 pts
Suppose a numerical variable has a 1st quartile value of 44 and a 3rd quartile value of 66. Which of the values below would NOT be considered an outlier for this variable?
10
100
-2
Correct!
33
Question 15
1 / 1 pts
The choropleth map below depicts the distribution of hybrid electric vehicle (HEV) registrations per thousand vehicles in the United Kingdom. What is the visual cue for number of HEVs in the map?
Correct!
shade
position
color
area
Question 16
0 / 1 pts
Below is a choropleth map for the 2016 Presidential election in the United States. The numerical values listed for each State represent the number of electoral votes. The color red represents the Republican candidate, while the color blue represents the Democratic candidate. On the map, the total geographic area of each color is a visual cue for what variable?
Number of electoral votes for each Party
You Answered
Proportion of electoral votes for each Party
Correct Answer
Total area is not a visual cue in this graphic
Number of residents who identify with each Party
Question 17
1 / 1 pts
The ggplot code below generates the subsequent box plot related to penguins of the Palmer Archipelago. If we want to expand the range of the x-axis from 150 to 250 mm and display increments of 5 mm, then what function would we add to the layering?
geom_bar()
scale_y_discrete()
annotate()
Correct!
scale_x_continuous()
Question 18
1 / 1 pts
The ggplot code below generates the subsequent choropleth map regarding rent-to-income ratios in the United States. If we want to assign specific colors to the Above Median Ratio factor, then what function would we add to the layering?
Correct!
scale_fill_manual()
scale_color_discrete()
geom_bar()
annotate()
Quiz Score: 15 out of 18